Hello everyone. I installed Linux Mint 64-bit Cinnamon edition. It worked fine after installation, but after a few reboots, it suddenly swapped to Mate. I logged out and yes, indeed, Cinnamon is selected. If I try to do

(cinnamon:2539): Gdk-ERROR **: The program 'cinnamon' received an X Window System error.This probably reflects a bug in the program.The error was 'BadRequest (invalid request code or no such operation)'. (Details: serial 131 error_code 1 request_code 155 minor_code 66) (Note to programmers: normally, X errors are reported asynchronously; that is, you will receive the error a while after causing it. To debug your program, run it with the GDK_SYNCHRONIZE environment variable to change this behavior. You can then get a meaningful backtrace from your debugger if you break on the gdk_x_error() function.)

(cinnamon:2609): Gdk-ERROR **: The program 'cinnamon' received an X Window System error.This probably reflects a bug in the program.The error was 'BadRequest (invalid request code or no such operation)'. (Details: serial 131 error_code 1 request_code 155 minor_code 66) (Note to programmers: normally, X errors are reported asynchronously; that is, you will receive the error a while after causing it. To debug your program, run it with the GDK_SYNCHRONIZE environment variable to change this behavior. You can then get a meaningful backtrace from your debugger if you break on the gdk_x_error() function.)Trace/breakpoint trap (core dumped)

I got a much more harmful issue after attempting to (and correctly doing so) install fglrx proprietary drivers that made me have a permanent black screen. Having not done much, I re-installed Linux Mint 14. I can tell you, however, that yes, this is likely caused by a driver issue.